Characterization of various oxygen species on an oxide surface:: RuO2(110)

被引：203

作者：

Kim, YD ^{[1
]}

Seitsonen, AP ^{[1
]}

Wendt, S ^{[1
]}

Wang, J ^{[1
]}

Fan, C ^{[1
]}

Jacobi, K ^{[1
]}

Over, H ^{[1
]}

Ertl, G ^{[1
]}

机构：

[1] Max Planck Gesell, Fritz Haber Inst, Dept Phys Chem, D-14195 Berlin, Germany

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2001年 / 105卷 / 18期

关键词：

D O I：

10.1021/jp003213j

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The stoichiometric RuO2(110) surface is terminated by bridge-coordinated oxygen atoms (O-beta) and by coordinatively unsaturated Ru (Ru-cus) atoms. Exposure to gaseous O-2 leads to the formation of two additional surface species: a molecularly chemisorbed state (O-delta) bridging two neighboring Ru-cus atoms and weakly held O atoms (O-gamma) in terminal position above the Ru-cus atoms. Characterization of the energetics and kinetics as well as structural, vibrational, and electronic properties is achieved by combined application of experimental (low-energy electron diffraction, high-resolution electron loss spectroscopy, thermal desorption spectroscopy) and theoretical (density functional theory) methods. The interplay between the different oxygen species accounts for the high sticking coefficient for dissociative adsorption as well as for the continuous restoration of the surface structure in the course of catalytic oxidation reactions.

引用

页码：3752 / 3758

页数：7

共 47 条

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